2-Propenoic acid, 2-methyl-, 2-(dimethylamino)ethyl ester, polymer with 2-propenenitrile 26777-63-9 Acrylonitriledimethylaminoethyl methacrylate copolymer Dimethylaminoethyl methacrylate-acrylonitrile copolymer Dmaema-AN